Functional characteristics and influence factors of microbial community in sewage sludge composting with inorganic bulking agent

Bioresource Technology
Ke WangXiangkun Li

Abstract

The metabolic function of microbial community dominated organics and nutrients transformation in aerobic composting process. In this study, the metabolic characteristics of bacterial and fungal communities were evaluated in 60 days composting of sludge and pumice by using FUNGuild and PICRUSt, respectively. The results showed that microbial community structure and metabolic characteristics were distinctively different at four composting periods. Bacterial genes related to carbohydrate metabolisms decreased during the first 30 days, but bacterial sequences associated with oxidative phosphorylation and fatty acids synthesis were enhanced in curing phase. Most of fungal animal pathogen and plant pathogen disappeared after treatment, and the abundance of saprotroph fungi increased from 44.3% to 97.8%. Oxidation reduction potential (ORP) significantly increased from -28 to 175 mV through incubation. RDA analysis showed that ORP was a crucial factor on the succession of both bacterial and fungal communities in sludge composting system.

Citations

Mar 13, 2019·Canadian Journal of Microbiology·Qingxin MengXiaotong Wu
May 1, 2019·Microbial Ecology·Tatiana Robledo-MahónConcepción Calvo
Jun 25, 2019·Canadian Journal of Microbiology·Yu FangJichen Chen
Dec 31, 2019·Environmental Science and Pollution Research International·Zhiqiang ChenChunrong Chai
Dec 15, 2020·Journal of Hazardous Materials·Sanjeev Kumar AwasthiMohammad J Taherzadeh
Jul 12, 2020·Journal of Hazardous Materials·Cece QiaoRong Li
Jun 4, 2021·The Science of the Total Environment·Germán TortosaEulogio J Bedmar
Jul 3, 2021·Journal of Environmental Management·Xiaomei ZhangBin Liang

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